CN106555109A - Have low temperature impact properties NM550 steel plates and its production method concurrently - Google Patents
Have low temperature impact properties NM550 steel plates and its production method concurrently Download PDFInfo
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- CN106555109A CN106555109A CN201610929649.0A CN201610929649A CN106555109A CN 106555109 A CN106555109 A CN 106555109A CN 201610929649 A CN201610929649 A CN 201610929649A CN 106555109 A CN106555109 A CN 106555109A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
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- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
One kind has low temperature impact properties NM550 steel plates and its production method concurrently, including smelts continuous casting working procedure, heating, rolling process and heat treatment step；The steel plate weight percentage：0.32%≤C≤0.37%, 0.20%≤Si≤0.50%, 1.10%≤Mn≤1.40%, P≤0.015%, S≤0.010%, 0.25%≤Cr≤0.50%, 0.25%≤Ni≤0.50%, 0.020%≤Al≤0.050%, 0.15%≤Mo≤0.40%, 0.010%≤Ti≤0.020%, 0.020%≤Nb≤0.040%, 0.001%≤B≤0.002%, balance of Fe and inevitable impurity.Produced steel plate has uniform tiny organizational structure and excellent comprehensive mechanical property.
Description
Technical field
The present invention relates to a kind of abrasion-resistant stee and its production method, especially one kind have low temperature impact properties NM550 steel plates concurrently
And its production method.
Background technology
Abrasion-resistant stee as a kind of important high-abrasive material, among being widely used in the industries such as mine, colliery and machinery.Companion
Preferably to as engineering machinery is proposed to maximization, light-weighted development, intensity, low temperature impact properties to abrasion-resistant stee etc.
Ask.The exploitation of China's abrasion-resistant stee is started late, although successively to have have developed NM360, NM400, NM450 etc. wear-resisting for the country
Steel, and produced in enormous quantities, but relative to the high-level abrasion-resistant stee for especially requiring low-temperature impact, remain a production difficult problem.
The content of the invention
What the technical problem to be solved in the present invention was to provide a kind of good mechanical performance has low temperature impact properties NM550 steel concurrently
Plate；Present invention also offers a kind of production method for having low temperature impact properties NM550 steel plates concurrently.
To solve above-mentioned technical problem, the present invention is made up of the composition of following weight percentage：0.32%≤C≤
0.37%, 0.20%≤Si≤0.50%, 1.10%≤Mn≤1.40%, P≤0.015%, S≤0.010%, 0.25%≤Cr≤0.50%,
0.25%≤Ni≤0.50%, 0.020%≤Al≤0.050%, 0.15%≤Mo≤0.40%, 0.010%≤Ti≤0.020%,
0.020%≤Nb≤0.040%, 0.001%≤B≤0.002%, balance of Fe and inevitable impurity.
- 40 DEG C of impact of collision work(>=20 joule at steel plate thickness of slab of the present invention 1/4.
Steel plate maximum gauge of the present invention is 60mm.
The inventive method includes smelting continuous casting working procedure, heating, rolling process and heat treatment step；The steel plate is by following heavy
The composition of amount percentage composition constitutes as described above.
Heating process described in the inventive method：Heating-up temperature≤1240 DEG C, 1220 DEG C -1240 DEG C of soaking temperature, soaking are protected
Warm time >=60min, total heat time heating time >=10min/cm.
Rolling process described in the inventive method：Using two-stage controlled rolling process；1050 DEG C of first stage start rolling temperature～
1150 DEG C, dry in the air steel thickness >=H+50mm, and wherein H is finished steel plate thickness；Second stage start rolling temperature≤950 DEG C, finishing temperature
≤880℃.In the rolling process, it is cold to enter water control after rolling, 650 DEG C～750 DEG C of red temperature；Then stacking slow cooling 48 hours and
More than.
Heat treatment step described in the inventive method adopts quenching+lonneal technique.The heat treatment step：Hardening media
For water, hardening heat is 910 DEG C ± 10 DEG C；Temperature is 200 DEG C ± 20 DEG C, and temperature retention time is (3.5～4.5) × t minutes,
T is steel plate mm of thickness；Air cooling after insulation.
Using the beneficial effect produced by above-mentioned technical proposal it is：The present invention has anti-wear performance and cold temperature impact concurrently
Can, with wearability is good, low-temperature impact toughness good, with plate hardness it is uniform the characteristics of.
The inventive method is rolled and Technology for Heating Processing with suitable by adding appropriate alloying element, so that produced steel
Plate has uniform tiny organizational structure and excellent comprehensive mechanical property, and gained NM550 steel plate maximum gauges can reach 60mm,
- 40 DEG C of impact of collision work(>=20 joule at thickness of slab 1/4, surface of steel plate Brinell hardness >=530HB；With moderate strength, thickness of slab 1/4
The characteristics of -40 DEG C of low-temperature impact toughness in place are excellent, has broad application prospects.
Specific embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Originally the production method for having low temperature impact properties NM550 steel plates concurrently includes smelting continuous casting working procedure, heating process, rolling
Operation and heat treatment step, the technique of each operation are as described below：
（1）Smelt continuous casting working procedure：First smelted using converter mode, be then fed in LF refining furnace, carrying out refine, then Jing VD stoves are true
Vacancy is managed, and obtains molten steel of tapping；During the VD stoves application of vacuum, vacuum≤66.5MPa, retention time >=15 minute.Tapping
Molten steel casts out blank through continuous casting operation, obtains continuous casting billet.The continuous casting billet is made up of the composition of following weight percentage：
0.32%≤C≤0.37%, 0.20%≤Si≤0.50%, 1.10%≤Mn≤1.40%, P≤0.015%, S≤0.010%, 0.25%≤
Cr≤0.50%, 0.25%≤Ni≤0.50%, 0.020%≤Al≤0.050%, 0.15%≤Mo≤0.40%, 0.010%≤Ti≤
0.020%, 0.020%≤Nb≤0.040%, 0.001%≤B≤0.002%, balance of Fe and inevitable impurity.
（2）Heating process：Heating-up temperature≤1240 DEG C, it is ensured that steel billet is grilled thoroughly, 1220 DEG C～1240 DEG C of soaking temperature, soaking
Duan Baowen >=60min, total heat time heating time >=10min/cm.
（3）Rolling process：Using two-stage controlled rolling process；1050 DEG C～1150 DEG C of first stage start rolling temperature, the steel that dries in the air are thick
Degree >=H+50mm, wherein H are finished steel plate thickness mm；Second stage start rolling temperature≤950 DEG C, finishing temperature≤880 DEG C；After rolling
Enter water control cold, 650 DEG C～750 DEG C of red temperature；Then stacking slow cooling, more than 48 hours stacking time.
（4）Heat treatment step：Using quenching+lonneal technique；The hardening heat is 910 DEG C ± 10 DEG C, and quenching is situated between
Matter is water；Temperature is 200 DEG C ± 20 DEG C, and temperature retention time is (3.5～4.5) × t minutes, and t is steel plate mm of thickness；Insulation
Air cooling afterwards, you can obtain described NM550 steel plates.
Embodiment 1：Originally the concrete production technology for having low temperature impact properties NM550 steel plates concurrently is as described below.
（1）Smelt continuous casting working procedure：During VD stove applications of vacuum, vacuum is 60MPa, 18 minutes retention times；Continuous casting is obtained
Continuous casting billet of the thickness for 300mm.
（2）Heating process：1238 DEG C of heating-up temperature, 1225 DEG C of soaking temperature, soaking zone insulation 66min, total heat time heating time
331 minutes.
（3）Rolling process：1150 DEG C of first stage start rolling temperature；Second-order dries in the air steel thickness for 125mm, and start rolling temperature is
950 DEG C, 880 DEG C of finish to gauge Wen Weidu；750 DEG C of red temperature；Stacking slow cooling 51 hours.
（4）Heat treatment step：Hardening heat is 915 DEG C, and hardening media is water；Temperature is 210 DEG C, and temperature retention time is
270min, air cooling of coming out of the stove.
The thickness of NM550 steel plates obtained by the present embodiment is 60mm, chemical composition as shown in table 1, mechanical property such as 2 institute of table
Show.
Embodiment 2：Originally the concrete production technology for having low temperature impact properties NM550 steel plates concurrently is as described below.
（1）Smelt continuous casting working procedure：During VD stove applications of vacuum, vacuum is 55MPa, 21 minutes retention times；Continuous casting is obtained
Continuous casting billet of the thickness for 300mm.
（2）Heating process：1233 DEG C of heating-up temperature, 1235 DEG C of soaking temperature, soaking zone insulation 63min, total heat time heating time
322 minutes.
（3）Rolling process：1110 DEG C of first stage start rolling temperature；Second-order dries in the air steel thickness for 120mm, and start rolling temperature is
920 DEG C, 841 DEG C of finish to gauge Wen Weidu；710 DEG C of red temperature；55 hours stacking slow cooling time.
（4）Heat treatment step：Hardening heat is 910 DEG C, and hardening media is water；Temperature is 200 DEG C, and temperature retention time is
233min, air cooling of coming out of the stove.
The thickness of NM550 steel plates obtained by the present embodiment is 60mm, chemical composition as shown in table 1, mechanical property such as 2 institute of table
Show.
Embodiment 3：Originally the concrete production technology for having low temperature impact properties NM550 steel plates concurrently is as described below.
（1）Smelt continuous casting working procedure：During VD stove applications of vacuum, vacuum is 58MPa, 20 minutes retention times；Continuous casting is obtained
Continuous casting billet of the thickness for 300mm.
（2）Heating process：1235 DEG C of heating-up temperature, 1220 DEG C of soaking temperature, soaking zone insulation 61min, total heat time heating time
308 minutes.
（3）Rolling process：1080 DEG C of first stage start rolling temperature；Second-order dries in the air steel thickness for 110mm, and start rolling temperature is
920 DEG C, 838 DEG C of finish to gauge Wen Weidu；701 DEG C of red temperature；53 hours stacking slow cooling time.
（4）Heat treatment step：Hardening heat is 920 DEG C, and hardening media is water；Temperature is 180 DEG C, and temperature retention time is
218min, air cooling of coming out of the stove.
The thickness of NM550 steel plates obtained by the present embodiment is 60mm, chemical composition as shown in table 1, mechanical property such as 2 institute of table
Show.
Embodiment 4：Originally the concrete production technology for having low temperature impact properties NM550 steel plates concurrently is as described below.
（1）Smelt continuous casting working procedure：During VD stove applications of vacuum, vacuum is 59MPa, 15 minutes retention times；Continuous casting is obtained
Continuous casting billet of the thickness for 300mm.
（2）Heating process：1230 DEG C of heating-up temperature, 1225 DEG C of soaking temperature, soaking zone insulation 69min, total heat time heating time
328 minutes.
（3）Rolling process：1050 DEG C of first stage start rolling temperature；Second-order dries in the air steel thickness for 115mm, and start rolling temperature is
915 DEG C, 822 DEG C of finish to gauge Wen Weidu；650 DEG C of red temperature；48 hours stacking slow cooling time.
（4）Heat treatment step：Hardening heat is 910 DEG C, and hardening media is water；Temperature is 200 DEG C, and temperature retention time is
210min, air cooling of coming out of the stove.
The thickness of NM550 steel plates obtained by the present embodiment is 60mm, chemical composition as shown in table 1, mechanical property such as 2 institute of table
Show.
Embodiment 5：Originally the concrete production technology for having low temperature impact properties NM550 steel plates concurrently is as described below.
（1）Smelt continuous casting working procedure：During VD stove applications of vacuum, vacuum is 62MPa, 22 minutes retention times；Continuous casting is obtained
Continuous casting billet of the thickness for 300mm.
（2）Heating process：1240 DEG C of heating-up temperature, 1240 DEG C of soaking temperature, soaking zone insulation 67min, total heat time heating time
320 minutes.
（3）Rolling process：1090 DEG C of first stage start rolling temperature；Second-order dries in the air steel thickness for 125mm, and start rolling temperature is
935 DEG C, 842 DEG C of finish to gauge Wen Weidu；688 DEG C of red temperature；52 hours stacking slow cooling time.
（4）Heat treatment step：Hardening heat is 910 DEG C, and hardening media is water；Temperature is 220 DEG C, and temperature retention time is
235min, air cooling of coming out of the stove.
The thickness of NM550 steel plates obtained by the present embodiment is 60mm, chemical composition as shown in table 1, mechanical property such as 2 institute of table
Show.
Embodiment 6：Originally the concrete production technology for having low temperature impact properties NM550 steel plates concurrently is as described below.
（1）Smelt continuous casting working procedure：During VD stove applications of vacuum, vacuum is 66.5MPa, 22 minutes retention times；Continuous casting is obtained
To the continuous casting billet that thickness is 300mm.
（2）Heating process：1235 DEG C of heating-up temperature, 1230 DEG C of soaking temperature, soaking zone insulation 60min, total heat time heating time
330 minutes.
（3）Rolling process：1070 DEG C of first stage start rolling temperature；Second-order dries in the air steel thickness for 120mm, and start rolling temperature is
930 DEG C, 840 DEG C of finish to gauge Wen Weidu；695 DEG C of red temperature；52 hours stacking slow cooling time.
（4）Heat treatment step：Hardening heat is 900 DEG C, and hardening media is water；Temperature is 200 DEG C, and temperature retention time is
230min, air cooling of coming out of the stove.
The thickness of NM550 steel plates obtained by the present embodiment is 60mm, chemical composition as shown in table 1, mechanical property such as 2 institute of table
Show.
Table 1：Chemical composition wt of each embodiment NM550 steel plate, %
In table 1, balance of Fe and inevitable impurity.
Table 2：The mechanical property of each embodiment NM550 steel plate
Can be seen that by the mechanical properties test result of table 2 and be satisfied by wanting by the NM550 plate properties that this method is produced
Ask, and -40 DEG C of ballistic work >=29J at thickness of slab 1/4.
Claims (9)
1. one kind has low temperature impact properties NM550 steel plates concurrently, it is characterised in that its composition structure by following weight percentage
Into：0.32%≤C≤0.37%, 0.20%≤Si≤0.50%, 1.10%≤Mn≤1.40%, P≤0.015%, S≤0.010%,
0.25%≤Cr≤0.50%, 0.25%≤Ni≤0.50%, 0.020%≤Al≤0.050%, 0.15%≤Mo≤0.40%, 0.010%
≤ Ti≤0.020%, 0.020%≤Nb≤0.040%, 0.001%≤B≤0.002%, balance of Fe and inevitable impurity.
It is 2. according to claim 1 to have low temperature impact properties NM550 steel plates concurrently, it is characterised in that：The steel plate thickness of slab 1/4
- 40 DEG C of impact of collision work(>=20 joule in place.
It is 3. according to claim 1 and 2 to have low temperature impact properties NM550 steel plates concurrently, it is characterised in that：The steel plate is maximum
Thickness is 60mm.
4. a kind of production method for having low temperature impact properties NM550 steel plates concurrently, it is characterised in that：It include smelt continuous casting working procedure,
Heating, rolling process and heat treatment step；The steel plate is made up of the composition of following weight percentage：0.32%≤C≤
0.37%, 0.20%≤Si≤0.50%, 1.10%≤Mn≤1.40%, P≤0.015%, S≤0.010%, 0.25%≤Cr≤0.50%,
0.25%≤Ni≤0.50%, 0.020%≤Al≤0.050%, 0.15%≤Mo≤0.40%, 0.010%≤Ti≤0.020%,
0.020%≤Nb≤0.040%, 0.001%≤B≤0.002%, balance of Fe and inevitable impurity.
5. the production method for having low temperature impact properties NM550 steel plates concurrently according to claim 4, it is characterised in that described
Heating process：Heating-up temperature≤1240 DEG C, 1220 DEG C -1240 DEG C of soaking temperature, soaking temperature retention time >=60min, when always heating
Between >=10min/cm.
6. the production method for having low temperature impact properties NM550 steel plates concurrently according to claim 4, it is characterised in that described
Rolling process：Using two-stage controlled rolling process；1050 DEG C～1150 DEG C of first stage start rolling temperature, dry in the air steel thickness >=H+50mm,
Wherein H is finished steel plate thickness；Second stage start rolling temperature≤950 DEG C, finishing temperature≤880 DEG C.
7. the production method for having low temperature impact properties NM550 steel plates concurrently according to claim 6, it is characterised in that：It is described
In rolling process, it is cold to enter water control after rolling, 650 DEG C～750 DEG C of red temperature；Then stacking slow cooling 48 hours and more than.
8. the production method for having low temperature impact properties NM550 steel plates concurrently according to claim 4-7 any one, which is special
Levy and be：The heat treatment step adopts quenching+lonneal technique.
9. the production method for having low temperature impact properties NM550 steel plates concurrently according to claim 8, it is characterised in that described
Heat treatment step：Hardening media is water, and hardening heat is 910 DEG C ± 10 DEG C；Temperature is 200 DEG C ± 20 DEG C, temperature retention time
For (3.5～4.5) × t minutes, t is steel plate mm of thickness；Air cooling after insulation.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108546870A (en) * | 2018-04-02 | 2018-09-18 | 舞阳钢铁有限责任公司 | Ultra-thick high-pressure boiler DIWA373 steel plates and production method |
| CN111041177A (en) * | 2019-12-11 | 2020-04-21 | 舞阳钢铁有限责任公司 | Production method of quenched and tempered 35CrMo die steel plate |
| CN112359284A (en) * | 2020-11-04 | 2021-02-12 | 南阳汉冶特钢有限公司 | High-strength low-temperature-toughness wear-resistant steel plate HY550NME and production method thereof |
| WO2024125055A1 (en) * | 2022-12-14 | 2024-06-20 | 南阳汉冶特钢有限公司 | Large-thickness sm3cr2ni1mo mold steel and production method therefor |
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| CN105779867A (en) * | 2016-03-10 | 2016-07-20 | 山东钢铁股份有限公司 | Free-cutting wear-resisting steel plate and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108546870A (en) * | 2018-04-02 | 2018-09-18 | 舞阳钢铁有限责任公司 | Ultra-thick high-pressure boiler DIWA373 steel plates and production method |
| CN111041177A (en) * | 2019-12-11 | 2020-04-21 | 舞阳钢铁有限责任公司 | Production method of quenched and tempered 35CrMo die steel plate |
| CN111041177B (en) * | 2019-12-11 | 2022-01-25 | 舞阳钢铁有限责任公司 | Production method of quenched and tempered 35CrMo die steel plate |
| CN112359284A (en) * | 2020-11-04 | 2021-02-12 | 南阳汉冶特钢有限公司 | High-strength low-temperature-toughness wear-resistant steel plate HY550NME and production method thereof |
| WO2024125055A1 (en) * | 2022-12-14 | 2024-06-20 | 南阳汉冶特钢有限公司 | Large-thickness sm3cr2ni1mo mold steel and production method therefor |
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